Chú ý: Để đảm bảo quyền lợi và bảo vệ tài khoản của mình
Bạn hãy xác thực địa chỉ email đăng ký nhé. Chi tiết xem tại đây
Bạn hãy xác thực địa chỉ email đăng ký nhé. Chi tiết xem tại đây
{"common":{"save":0,"post_id":"4766","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7879","post_id":"4766","mon_id":"1158113","chapter_id":"1158119","question":"<p>Không quy \u0111\u1ed3ng m\u1eabu s\u1ed1, hãy so sánh hai phân s\u1ed1 sau b\u1eb1ng cách \u0111i\u1ec1n d\u1ea5u thích h\u1ee3p (>; <; =)<\/p><p><span class=\"math-tex\">$\\dfrac{18}{19}$<\/span> <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/> <span class=\"math-tex\">$\\dfrac{21}{20}$<\/span><\/p>","options":"","correct":["[\"<\"]"],"level":"2","hint":"<p>So sánh hai phân s\u1ed1 trên v\u1edbi 1.<\/p>","answer":"<p>Vì 18 < 19 nên <span class=\"math-tex\">$\\dfrac{18}{19}$<\/span> < 1<\/p><p>Vì 21 > 20 nên <span class=\"math-tex\">$\\dfrac{21}{20}$<\/span> > 1<\/p><p>Do \u0111ó <span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{18}{19}<\\dfrac{21}{20}$<\/span><\/span><\/p><p>D\u1ea5u c\u1ea7n \u0111i\u1ec1n là <strong><span style=\"color:#16a085;\"> <<\/span><\/strong><\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"1","date":"2021-09-30 13:20:47"},{"id":"7883","post_id":"4766","mon_id":"1158113","chapter_id":"1158119","question":"<p>Ch\u1ecdn các câu <strong>\u0111úng<\/strong><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$2\\dfrac{9}{16}=\\dfrac{41}{16}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$7\\dfrac{3}{5}=\\dfrac{38}{7}$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$6\\dfrac{2}{7}=\\dfrac{44}{7}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$1\\dfrac{8}{23}=\\dfrac{31}{23}$<\/span>"],"correct":"[\"1\",\"3\",\"4\"]","level":"2","hint":"<p>\u0110\u1ed5i h\u1ed7n s\u1ed1 sang phân s\u1ed1: <span class=\"math-tex\">$a\\dfrac{b}{c}=\\dfrac{a.c+b}{c}$<\/span><\/p>","answer":"<p><strong>A.<\/strong> <span class=\"math-tex\">$2\\dfrac{9}{16}=\\dfrac{41}{16}$<\/span> (<span style=\"color:#16a085;\">\u0111úng <\/span>vì <span class=\"math-tex\">$2\\dfrac{9}{16}=\\dfrac{2.16+9}{16}=\\dfrac{41}{16}$<\/span>)<\/p><p><strong>B.<\/strong> <span class=\"math-tex\">$7\\dfrac{3}{5}=\\dfrac{38}{7}$<\/span> (<span style=\"color:#c0392b;\">sai <\/span>vì <span class=\"math-tex\">$7\\dfrac{3}{5}=\\dfrac{7.5+3}{5}=\\dfrac{38}{5}$<\/span> )<\/p><p><strong>C. <\/strong><span class=\"math-tex\">$6\\dfrac{2}{7}=\\dfrac{44}{7}$<\/span> (<span style=\"color:#16a085;\">\u0111úng <\/span>vì <span class=\"math-tex\">$6\\dfrac{2}{7}=\\dfrac{6.7+2}{7}=\\dfrac{44}{7}$<\/span> )<\/p><p><strong>D.<\/strong> <span class=\"math-tex\">$1\\dfrac{8}{23}=\\dfrac{31}{23}$<\/span> (<span style=\"color:#16a085;\">\u0111úng <\/span>vì <span class=\"math-tex\">$1\\dfrac{8}{23}=\\dfrac{1.23+8}{23}=\\dfrac{31}{23}$<\/span> )<\/p><p>Các \u0111áp án \u0111úng là <span style=\"color:#16a085;\"> <strong>A.<\/strong> <span class=\"math-tex\">$2\\dfrac{9}{16}=\\dfrac{41}{16}$<\/span> ; <strong>C. <\/strong><span class=\"math-tex\">$6\\dfrac{2}{7}=\\dfrac{44}{7}$<\/span> và <strong>D.<\/strong> <span class=\"math-tex\">$1\\dfrac{8}{23}=\\dfrac{31}{23}$<\/span><\/span><\/p>","type":"checkbox","extra_type":"classic-checkbox","time":"0","user_id":"131","test":"3","date":"2021-09-30 13:34:48","option_type":"math","len":0},{"id":"7886","post_id":"4766","mon_id":"1158113","chapter_id":"1158119","question":"<p>Ch\u1ecdn câu <strong>\u0111úng<\/strong><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{9}<\\dfrac{3}{7}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{-6}{11}<\\dfrac{-8}{13}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{6}{-7}=\\dfrac{-8}{9}$<\/span>"],"correct":"1","level":"2","hint":"<p>Quy \u0111\u1ed3ng m\u1eabu các phân s\u1ed1 r\u1ed3i so sánh.<\/p>","answer":"<p><strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{9}<\\dfrac{3}{7}$<\/span> (<span style=\"color:#16a085;\">\u0111úng <\/span>vì <span class=\"math-tex\">$\\dfrac{2}{9}=\\dfrac{14}{63}$<\/span> và <span class=\"math-tex\">$\\dfrac{3}{7}=\\dfrac{27}{63}$<\/span> mà 14 < 27 nên <span class=\"math-tex\">$\\dfrac{2}{9}<\\dfrac{3}{7}$<\/span> )<\/p><p><strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{-6}{11}<\\dfrac{-8}{13}$<\/span> (<span style=\"color:#c0392b;\">sai <\/span>vì <span class=\"math-tex\">$\\dfrac{-6}{11}=\\dfrac{-78}{143}$<\/span> và <span class=\"math-tex\">$\\dfrac{-8}{13}=\\dfrac{-88}{143}$<\/span> mà -78 > -88 nên <span class=\"math-tex\">$\\dfrac{-6}{11}>\\dfrac{-8}{13}$<\/span> )<\/p><p><strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{6}{-7}=\\dfrac{-8}{9}$<\/span> (<span style=\"color:#c0392b;\">sai <\/span>vì <span class=\"math-tex\">$\\dfrac{6}{-7}=\\dfrac{-54}{63}$<\/span> và <span class=\"math-tex\">$\\dfrac{-8}{9}=\\dfrac{-56}{63}$<\/span> mà -54 > -56 nên <span class=\"math-tex\">$\\dfrac{6}{-7}>\\dfrac{-8}{9}$<\/span> )<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{9}<\\dfrac{3}{7}$<\/span> <\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-09-30 13:44:10","option_type":"math","len":0}]}